html,body{
    width: 100%;
    height: 100%;
}
*{
    margin: 0;
    padding: 0;
}
body{
    display: flex;
    flex-direction: column;
    #vid{
        width: 100%;
        height: 371px;
        background: #000;
        .fanhui{
            width: 40px;
            height: 40px;
            font-size: 30px;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            color: #fff;
            margin: 10px 0 0 10px;
        }
    }
}
